How much do you weigh? 105 kg? Are you planing on a 7.5 on a 124 liter mistral in 13 mph? Salt water maybe? Hard to believe. Anyway, I weight 77 kg (167 lbs) and can't plane in 13 mph winds (white caps beginning to form) with a 7.5 on my formula board. With a 9.2 sail and my formula - yes, with some pumping. Probably the 8.4 too with a lot of pumping. Of course, I don't know what sailing in steady winds is like so when I get on plane in marginal conditions, it's usually not for long, so I have to rig big to keep going.

I have a bunch of stuff and a dedicated van, but some of it has been around for a long time. I take pretty good care of the gear, so I get good, long service. I did replace one sail and two booms this year.

You can see that I got 21 days with the 8.4 and larger sails. I am glad I had the big stuff to stay on the water PLANING for the extra days.

When I bought the iSonic, I was divided between it and the Futura, but I finally went with the iS for two reasons. One, I like the challenge of a more demanding board. Two - earlier planing, faster acceleration and potentially better top speed (Yes, I know, more than two reasons). It also fit perfectly into my quiver of sails.